2613991 has 2 divisors, whose sum is σ = 2613992. Its totient is φ = 2613990.

The previous prime is 2613983. The next prime is 2613997. The reversal of 2613991 is 1993162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2613991 - 2³ = 2613983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2613997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1306995 + 1306996.

It is an arithmetic number, because the mean of its divisors is an integer number (1306996).

2^2613991 is an apocalyptic number.

2613991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2613991 is an equidigital number, since it uses as much as digits as its factorization.

2613991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 31.

The square root of 2613991 is about 1616.7841538066. The cubic root of 2613991 is about 137.7530941781.

The spelling of 2613991 in words is "two million, six hundred thirteen thousand, nine hundred ninety-one".